/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.distributedlog.common.util;

import io.netty.buffer.ByteBuf;

/**
 * Utils to handle with {@link io.netty.buffer.ByteBuf}.
 */
public class ByteBufUtils {

    public static byte[] getArray(ByteBuf buffer) {
        if (buffer.hasArray() && buffer.arrayOffset() == 0 && buffer.writableBytes() == 0) {
            return buffer.array();
        }
        byte[] data = new byte[buffer.readableBytes()];
        buffer.getBytes(buffer.readerIndex(), data);
        return data;
    }

}
